Cutlery-polishing machine.



P. DAVIS.

GUTLERY POLISHING MAGINB.

APPLIGATIQN FILED 11130.11, 1912.

Patented VJ une 24, 1913.`

2 SHEETS-SHEET 1.

Inventr: mg, 9

COLUMBIA PLANOGRAPH C0., WASHINGTON. D. c.

P. DAVIS.

Patented June 24, 1913.

- Z SHEETS-SHEET 2.

. Inventor:

MWI-Q COLUMNA PLANOURAFH Co.,w^sri| UNITED STATES PATENT OFFICE.

PATRICK DAVIS, 0F NEW YORK, N. Y.

CUTLERY-POLISI-IING- MACHINE.

To @ZZ whom t may concern:

Be it known that I, PATRICK DAVIS, a citizen of the United States.residing at 2707 Kingsbridge Terrace, New York, N. Y.,have invented. newand useful Improvements in Cutlery-Polishing Machines, of which thefollowing is a specification.

This invention relates to a cutlery polishing machine and moreespecially to machines of this character adapted to be used forpolishing knives.

One of the objects of the invention is to provide a machine in which thepossibility of destroying the polishing disks, upon withdrawing thepolished article, is reduced to a minimum.

Another object is to provide a machine of this character in which thedisks are constantly urged into contact with one another during itsoperation.

Another object is to provide a machine of this character in which thedisks may be easily removed when it is desired to repair the same or toreplace them with new disks.

Another object is to provide a machine which is simple in constructionand in operation, which is not liable to get out of order. and whichwill be inexpensive to manufacture.

Other objects will in part be obvious and part be pointed' outhereinafter.

In the accompanying' drawings showing an illustrative embodiment of theinvention and in which the same reference numerals refer to similarparts in the several figures, Figure 1 is a side elevation of themachine. Fig. 2 is a plan view thereof, part being broken away for thesake of clearness. Fig. 3 is a sectional view taken on the line A-A ofFig. 2. Fig. t is a detail view showing the construction of one of thedisks.

In the illustrative embodiment of the invention shown in the drawings,the machine comprises a frame having a base port-ion 1, in the sidewalls of which is journaled a rock shaft 2, having detachably securedthereto upwardlyy extending arms 3, 4 and 5. These arms are provided attheir upper ends with bearings 6, in which is journaled a shaft 7, towhich is secured a worm wheel 8 adapted to be driven in a mannerhereinafter described.v

Specication of Letters Patent. Application led December 11, 1912.

Upon the shaft 7 is mount- Patented June 24, 1913. Serial N o. 736,087.

ed a square sleeve 10, which is rotatable with the shaft, being securedthereto in any suitable manner, as by a pin for example. The sleeve isprovided with a shoulder 9 at one end and its other end is threaded toreceive a nut 11.

Itemovably mounted upon the sleeve are three or more polishing disks,there being three shown in the drawing by way of illustration, althoughit will of course be understood that a greater number of disks could beemployed if desired. Each disk comprises a pair of annular side plates12, preferably formed of metal, which support between their outer edgesa comparatively narrow ring shaped member 13 formed of rubber or thelike, having a circumferential facing 14 of leather or some othersuitable polishing material.

It will be understood that after placing the disks in position on thesleeve they may be held firmly in position thereon by screwing the nut11 in place. It will also be understood that by removing the nut 11 thedisks may be slid off of the sleeve l0 if it is desired to repair orreplace one of them or the sleeve carrying the disks may be removed fromthe shaft.

A shaft 15 is rotatably supported within the frame and is held againstlateral movement. This shaft 15 is provided with a worm wheel similar tothe worm wheel 8 on shaft 7, and it is also provided with three or moredisks similar in all respects to the disks above described, which disksare mounted upon shaft 15 in the same manner that the disks are mountedupon shaft 7. Further illustration of these parts, therefore, is deemedunnecessary. v

In order to vary the pressure between the circumferences of the two setsof disks carried by the Vshafts 7 and 15 respectively, means areprovided for moving the shaft 7 laterally. As shown, this meanscomprises a rod 16 secured at its inner end to one of the arms l andhaving its outer end extending outside 0f the frame, as clearly shown inFigs. 1 and 2. The outer end of the rod 16 is threaded and a wing nut 17is carried thereby, which wing nut is adapted to engage with the frameof the machine. From this description it will be understod that byturning the wing nut 17 in one direction or the other the arm 4l, whichis secured to the roet shaft '2, will be rotated, thereby causing theshaft 7 to be moved toward or away from the shaft.

ln order to provide means for affording easy access to the sleeves 10and the disks mounted thereon, the frame is shown as comprising aremovable end plate 18, which is secured to the base 1 by removablefasten ing devices 19. The upper edge of the end plate 1S is preferablyon a line with the horizontal diameters of the shafts 7 and As shown inFig. 1 the plate 1S carries the bearing for the outer end of the shaft15, and as shown in Fig. f5, the plate 18 is positioned inside of thearm 3. Covers 19 are provided for the disks, which covers are removablysecured to the frame in any suitable manner. The covers are cut away at2O to provide a space for the instrument to be polished. As clearlyshown in Fig. 1 an elongated opening E21 is provided between the cover19 and the plate 18 to permit lateral movement of the shaft 7.

V-shaped guard members 22 are positioned between adjacent pairs ofdisks, which guards are supported from the covers 19 as clearly shown inFigs. 1 and 2.

The disks are rotated in opposite directions through the medium of adriving shaft 23 provided with oppositely disposed worms 2a, which arein engagement with the worm wheels 8 secured to shafts 7 and 15. Theworms 211 are so positioned that when the machine is being operated thepressure of the worms upon the worm wheels will tend to force themovable shaft 7 toward the fixed shaft 15. The driving shaft .23 may ofcourse be driven in any suitable manner; as `shown it is driven by amotor 211 which is mounted on an extension of the base 1. lt isunderstood, however, that this invention is not to be limited to thisprecise way of driving the shaft 23.

T he worms Q4 are preferably protected by removable covers 25 secured tothe base of the frame in any suitable manner.

Vlhe operation of the machine, which should be largely obvious from theabove description, is as follows: Then it is desired to polish a knifefor example, the motor is started thereby causing' the. disks to rotatein opposite directions, the disks on shaft 7 rotating in a clock-wisedirect-ion as viewed in Fig. 1, and the disks on shaft 15 rotating in ananti-clock-wise direction. 1t will of course be understood. that theposition of the shaft 7 relatively to the shaft 15 will be adjusted bymeans of nut 17 and rod 16 to provide the proper circui'nferentialengagement of the disks with one another. The knife is then insertedbetween the disks from the top and is polished in the usual. manner whenusing machines of this character. After the knife is polished it iswithdrawn by a longitudinal outward movement and by reason of the factthat three or more comparatively narrow disks are used, there will beless tendency for the knife to cut the polishing surfaces of the disksthan is the case where one or two comparatively wide disks are employed.During the polishing the knife any tendency of the disks to be separatedby the insertion of the knife between them will he overcome by reason ofthe fact that the worms are so positioned that they tend to force thedisks on the movable shaft into engagcment with the disks on the fixedshaft.

if it is necessary to repair or replace one of the disks it is merelynecessary to remove the covers 19 and the outer arm 3, after which theend plate. 18 may be removed, thereby affording free access to the disksand means for supporting' them on the sleeves 10.

Having described this invention in connection with the illustrativeembodiment thereof to the details of which disclosure the invention isnot of course to be limited, what is claimed as new and what is desiredto be secured by Letters Patent is set forth in the appended claims 1.ln a cutlery polishing machine, in combinat-icn, a frame, a pair ofshafts rotatably mo-unted therein, rocking arms pivotally mounted onsaid frame and supporting one of said shafts whereby the latter ismovable in a lateral direction, co-acting' disks carried by said shafts,and means for rotating said shafts in opposite directions, said meanscomprising gear wheels mounted on said shafts and driving means engagingsaid wheels, the points of engagement of said driving means with saidwheels and the pivotal points of support of said arms lying on oppositesides of the shafts, whereby the movable shaft will be constantly urgedtoward the other shaft.

2. ln a cutlery polishing machine, in combination, a frame, a pair ofshaft-s rotatably mounted therein, rocking arms pivotally mounted onsaid frame and supporting one of said shafts whereby the latter' ismovable in a lateral direction, co-actingl disks carried by said shafts,worm wheels secured to said shafts, a driven shaft and oppositelydisposed worms on said driven shaft operatively engaging said wormwheels, the points of engagement of said worms with said wheels and thepivotal points of support of said arms lying on opposite sides of theshafts, whereby the movable shaft will be constantly urged toward theother shaft.

8. 1n a cutlery polishing machine, in combination, a frame, a pair ofshafts rotatably mounted therein, one of said shafts being movable in alateral direction, co-acting disks carried by said shafts, worm wheelssecured to said shafts, a driven shaft and oppositely disposed Worms onsaid driven able Cover plates, and polishing disks rolo,

shaftoperatively engaging said Worm tatably supported in said frame.

Wheels, the Worm which engages the Worm In testimony whereof I havesigned my Wheel on said transversely movable shaft name to thisspecification in the presence of being arranged to constantly urge saidshaft tivo subscribing Witnesses.

toward the other of said shafts. PATRICK DAVIS.

4. In a cutlery polishing machine, in com* IVitnesses: bination, a framecomprising a base, an end ERNEST F. GAMS, plate detachably securedthereto and reinov- FRED. C. RosoHnR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington D. C. M

